Lucid descriptions of Global Navigation Satellite Systems (GNSS) are provided in this thorough and reader-friendly book. GNSS plays a significant role in high accuracy navigation positioning and technical questions connected to accurate positioning. It is an extremely accurate constant all-weather and real-time method. This book presents current outcomes and innovations in GNSS technology organization signal receiver technique and sources of error. Its various functions in hybrid positioning multi-sensor incorporation height system NRTK etc. have also been evaluated and analyzed. This book intends to help experts and students in knowing the topic in a better way.